package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.PasswordEditDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;
import java.time.LocalDateTime;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        //对比前端传过来的文明密码进行md5加密处理
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     *
     * @param employeeDTO 新增员工
     */
    @Override
    public void save(EmployeeDTO employeeDTO) {
        //员工数据写入到数据库中
        //service-> mapper
        //有值之后再完成数据库的写入操作
        Employee employee = new Employee();
        //对象属性拷贝 将employeeDTO的属性拷贝到employee
        //将employeeDTO转为employee实体类
        BeanUtils.copyProperties(employeeDTO,employee);
        //设置默认状态，默认状态为正常 1表示正常，0表示锁定
        employee.setStatus(StatusConstant.ENABLE); //设置默认状态

        //设置默认密码，默认密码为123456
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
        //设置当前的创建时间和更新时间
//        employee.setCreateTime(LocalDateTime.now());
//        employee.setUpdateTime(LocalDateTime.now());

        //设置当前记录创建人id和更改人id
//        employee.setCreateUser(10L);
//        employee.setUpdateUser(10L);
//        employee.setCreateUser(BaseContext.getCurrentId());
//        employee.setUpdateUser(BaseContext.getCurrentId());

        employeeMapper.save(employee);
    }

    @Override
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO) {
        //调用pageHelper，开启分页
        //第一个参数，当前页，第二个参数，当前页显示多少行
        PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());
        //查询分页
        Page<Employee> page = this.employeeMapper.pageQuery(employeePageQueryDTO);

        return new PageResult(page.getTotal(),page.getResult());
    }

    @Override
    public void startOrStop(Integer status, Long id) {
        Employee employee = Employee.builder()
                .id(id)
                .status(status)
                .updateTime(LocalDateTime.now())
                .updateUser(BaseContext.getCurrentId())
                .build();
        employeeMapper.update(employee);
    }

    @Override
    public void update(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO,employee);

//        employee.setUpdateTime(LocalDateTime.now());
//        employee.setUpdateUser(BaseContext.getCurrentId());

        employeeMapper.update(employee);
    }

    @Override
    public Employee getById(Long id) {
        Employee employee = employeeMapper.getById(id);
        employee.setPassword("****");
        return employee;
    }

    @Override
    public void editPassword(PasswordEditDTO passwordEditDTO) {


        //获取当前登录用户的id
        Long empId = BaseContext.getCurrentId();
        //就可以查到数据库的用户信息
        Employee employee = employeeMapper.getById(empId);
        //当前 前端传过来的oldPassword进行md5加密后
        String pwd = DigestUtils.md5DigestAsHex(passwordEditDTO.getOldPassword().getBytes());
        //进行对比
        if (!pwd.equals(employee.getPassword())) {
            //原密码错误
            throw new PasswordErrorException("原密码错误");
        }
        //如果输入的原密码与数据库密码相同，则进行修改，把newPassword进行MD5加密存入数据库，密码修改成功
         employeeMapper.update(employee);
       }


}
